43120591 has 2 divisors, whose sum is σ = 43120592. Its totient is φ = 43120590.

The previous prime is 43120549. The next prime is 43120601. The reversal of 43120591 is 19502134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43120591 - 2⁹ = 43120079 is a prime.

It is a super-3 number, since 3×43120591³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43120541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21560295 + 21560296.

It is an arithmetic number, because the mean of its divisors is an integer number (21560296).

Almost surely, 2^43120591 is an apocalyptic number.

43120591 is a deficient number, since it is larger than the sum of its proper divisors (1).

43120591 is an equidigital number, since it uses as much as digits as its factorization.

43120591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 43120591 is about 6566.6270641784. The cubic root of 43120591 is about 350.6670029000.

The spelling of 43120591 in words is "forty-three million, one hundred twenty thousand, five hundred ninety-one".